<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 开片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRoleById(scope.row, item1.id)">{{
                  item1.authName
                }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环 嵌套渲染二级权限 -->
                <el-row
                  :class="['', i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRoleById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRoleById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- pre预格式化的文本 -->
            <!-- <pre> {{scope.row}}</pre>                    -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" prop="" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-search"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="showSetRightDialogVisible"
      width="50%"
      @close="showSetRightDialogClosed"
    >
    <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" 
      show-checkbox node-key="id" default-expand-all 
      :default-checked-keys="defKeys" ref="treeRef"	></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="showSetRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
        // 默认选中的节点ID值
        defKeys:[],
        // deArrayKes:[],
        // 所有角色列表数据
        rolelist: [],
        // 控制分配权限对话框的显示和隐藏
        showSetRightDialogVisible:false,
        // 所有权限的数据
        rightslist:[],
        // 树形控件的属性绑定对象
        treeProps:{
            label:'authName',
            children:'children'
        },
        // 当前即将分配权限的角色Id
        roleId:[],
    }
    
  },
  created() {
    this.getRolesList()
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')

      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolelist = res.data
    },
    // 根据ID删除对应权限
    async removeRoleById(role, rightId) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )

      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      // 删除权限后,将返回的数据赋值给页面,防止页面刷新，提示用户体验
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
        // 获取所有权限的数据
        const {data:res} = await this.$http('rights/tree')
        if(res.meta.status !== 200){
            return this.$message.error('获取权限分配列表失败')
        }
        // 把获取到的权限数据保存到data中
        this.rightslist = res.data
        this.deArrayKes = res
        console.log(this.rightslist)

      console.log(role)
        // 递归获取三级节点的Id
        this.getLeafKeys(role,this.defKeys)

        this.showSetRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的Id,并保存到defkeys 数组中
    getLeafKeys(node, arr){
        // 如果当前 node 节点不包含children属性，则是三级节点
        if(!node.children){
          // debugger
            return arr.push(node.id)
        }
        node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    showSetRightDialogClosed(){
      this.defKeys = []

    },
    // 点击为角色分配权限
    async allotRights(){
      const keys = [
      // 获取到被选中节点的数组,...是展开运算符
      ...this.$refs.treeRef.getCheckedKeys(),
      // 获取到半选中节点的数组
      ...this.$refs.treeRef.getHalfCheckedKeys(),
      ]
      console.log(keys)
      const idStr = keys.join(',')
      console.log(idStr)

      const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
      if(res.meta.status !== 200){
        return this.$message.error('分配权限失败！')
      }
       this.$message.success('分配权限成功！')
       this.getRolesList()
       this.showSetRightDialogVisible = false
    }
  },
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>